Frequency converter with current source inverter for windmill application

摘要

A frequency converter with current source inverter and a DC link transformer is under investigation in this paper. The converter is shown to reduce reactive power consumption in case of symmetric line commutation of the inverter. It is incapable of adequate operation in case when there are positive parts in the instantaneous value of inverter EMF because a low inductance of DC link does not limit a circulating current. Different modes of generator control for maximal output power by means of the converter are examined. A control system based on tracking the frequency of generator is recommended for low power application. The results of testing are given. The experience of building a standard converter from industrially manufactured blocks is described. Probale tendencies of farther converter development are discussed.